Design and Analysis of Integrated Manufacturing Systems (1988) / Chapter Skim
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A New Perspective on Manufacturing Systems Analysis
A New Perspective on Manufacturing Systems Analysis
Pages 118-133
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From page 118... ...
In the wake of the resultant planning, design, evaluation, and operation of vast numbers of plants, the analysis and modeling of manufacturing systems has become a vital activity. But as this interest in manufacturing analysis has grown, those of us who have concentrated on "traditional" analysis approaches must ask whether we are in the mainstream.
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From page 119... ...
In a highly autoTAB~E 1 Typical Performance-Related Decisions During the Design and Operation of a Manufacturing System Typical Decisions Typical Measures of Performance Number and types of machines Number of load/unload stations Part-types Alternative routings Tool allocation Number and types of fixtures Number of transporters and pallets System layout Buffer sizes Period of payback Return on investment Net present value Facility utilization Production rates Work in progress Part and material flow times System flexibility Queues at each resource Operating policies
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From page 120... ...
It will be informative to see what the competition has been doing in these areas. THE "JAPANESE WAY" A DIFFERENT APPROACH The Japanese approach to manufacturing has fundamentally affected the way inRAJAN SURI dustry views this field (Hall, 1983, Schonberger, 1982~.
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From page 121... ...
Indeed, one gets the distinct impression that an AI-based project would be more likely to receive funding or contracts than one based on traditional approaches. Optimized Production Technology Optimized production technology (OPT)
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From page 122... ...
One hears of major projects being funded on the basis of such studies, where the basic assumptions about the data and approach were flawed but the animation sold the project. Summing up the New Developments Four of the most recent and visible developments in manufacturing analysis are the following: The Japanese approaches AI/expert systems · Optimized production technology · Graphic animation RAJAN SURI These are prominent recent approaches in the sense that they appear to be receiving more attention, publicity, and money than any other analysis techniques.
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From page 123... ...
In a similar way, traditional analysis methods can be used to complement or enhance other recent analysis approaches such as expert systems. The challenge is to show that the traditional analysis community can successfully learn what is needed and produce effective implementations and success stories similar to the four described in pre· , .
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From page 124... ...
We begin the following discussion with the feasibility analysis stage. Each of the following sections discusses some of the crit ical stages in the manufacturing system life cycle, identifies appropriate analysis needs, and suggests selected research issues.
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From page 125... ...
(1986~. Typical analysis techniques that will be found useful in the aggregate analysis phase are strategic and economic analysis, such as decision-tree analysis and discounted cash flows, the use of queueing analysis and queueing network models, simulation models that can treat aggregated systems (Surf
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From page 126... ...
Performance measures that are appropriate for this phase include those used in previous phases plus the utilization levels and response times for the material handling and storage subsystem, the utilization levels of the tooling and fixturing, the frequency of blocking and resource contentions, the response times-for the computer hardware
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From page 127... ...
Although simulation is widely used by industry, few practical tools exist for the statistical analysis of simulation output, and almost none exist for the optimization of simulation results. Hence, in the framework suggested in this paper, selected research issues relevant to the detail analysis phase are these: · Development of a theory of discrete event dynamic systems (DEDS)
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From page 128... ...
For the operational phase, the main aims are the development of effective schedules, effective loading sequences, and job releases and the development of effective responses to disruptions due to breakdowns, nonavailability of material, etc. Specific issues, performance measures, and analysis techniques for the ongoing operations phase are not enumerated here.
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From page 129... ...
There is also a potential for applying many of the new approaches to discrete event systems mentioned earlier, in a real-time optimization mode (Surf and Leung, 1987) , and for coupling these with traditional control-theoretic ideas (Gershwin et al., 1986~.
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From page 130... ...
The team decides to put together a simulation model to allow all of these parameters to be studied. Team B decides to consider simple performance policies and finds that a spreadsheet package along with a simple analytic modeling RAJAN SURI tool (e.g., Suri and Diehl, 1987)
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From page 131... ...
Design for analysis is also a step toward that goal, in that it offers specific approaches and yardsticks, through the available analysis tools, by which to learn whether simplicity is being achieved. Research Potential There is more depth to this methodology than may be evident from the foregoing brief description, and there is scope for novel research on this concept.
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From page 132... ...
1987. Performance evaluation and perturbation analysis of discrete event dynamic systems: Perspectives and open problems.
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From page 133... ...
In Design and Analysis of Integrated Manufacturing Systems, W Dale Compton, ed.
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